CN219608117U - Balanced nozzle and flowmeter - Google Patents
Balanced nozzle and flowmeter Download PDFInfo
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- CN219608117U CN219608117U CN202320811119.1U CN202320811119U CN219608117U CN 219608117 U CN219608117 U CN 219608117U CN 202320811119 U CN202320811119 U CN 202320811119U CN 219608117 U CN219608117 U CN 219608117U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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Abstract
The utility model relates to the technical field of flow metering, and particularly discloses a balance nozzle and a flow meter. Through the setting of center nozzle and a plurality of edge nozzle, reduce the pressure loss when fluid passes through, reduce simultaneously to the requirement of upstream and downstream straight tube section length, and the diameter of edge nozzle is greater than the diameter of center nozzle, because the fluid velocity of flow of edge department is little, the fluid velocity of flow of central point position is big, has reduced the disturbance degree of fluid behind center nozzle and a plurality of edge nozzle, promotes the measurement accuracy of sensor.
Description
Technical Field
The utility model relates to the technical field of flow metering, in particular to a balance nozzle and a flowmeter.
Background
In the field of fluid flow measurement, differential pressure type flow meters are most widely applied, and the differential pressure type flow meters calculate the flow of fluid by utilizing the pressure difference between the front and rear of the flow meter, wherein the pressure loss of a nozzle flow meter is smaller, so that the energy is saved, the differential pressure type flow meter is firm and durable and suitable for high-temperature and high-pressure fluid, but the processing difficulty of the nozzle flow meter is higher, a straight pipe with a longer distance is required at the upstream and downstream of the flow meter, and the measuring precision is poorer and the measuring range is smaller at low flow rate.
The utility model provides a nozzle formula differential pressure flowmeter in the prior art, this flowmeter is through evenly setting up a plurality of nozzles in order to further reduce pressure loss, and can reduce the length requirement to upstream and downstream straight tube section, but because the inside wall of pipeline is to the influence of fluid, the velocity distribution of fluid in the pipeline is inhomogeneous, and the fluid velocity of flow that is close to pipeline center department is big in particular, and the fluid velocity of flow that is close to pipeline inside wall department is little, leads to a plurality of fluids to exist the disturbance great after a plurality of nozzle exports, leads to the lower problem of measurement accuracy.
Disclosure of Invention
The utility model aims to provide a balance nozzle and a flowmeter, which are used for solving the problem of low measurement precision of the conventional nozzle type differential pressure flowmeter.
The utility model provides a balance nozzle which is used for a flowmeter and comprises a substrate, a central nozzle and a plurality of edge nozzles, wherein the cross section of the substrate comprises a circle, the central nozzle is fixedly arranged on the substrate, the central nozzle is coaxial with the substrate, the plurality of edge nozzles are fixedly arranged on the substrate, the axes of the plurality of edge nozzles are parallel to the axis of the central nozzle, and the diameter of the edge nozzle is larger than that of the central nozzle.
As a preferred embodiment of the balancing nozzle, the center nozzle includes:
the central inlet part is fixedly arranged on the substrate;
and the central linear part is integrally connected with the central inlet part, and the axis of the central linear part is coaxial with the substrate.
As a preferred embodiment of the balancing nozzle, the edge nozzle includes:
an edge inlet part fixedly arranged on the substrate;
and the edge linear part is integrally connected with the edge inlet part, and the axis of the edge linear part is parallel to the axis of the central linear part.
As the preferable technical scheme of the balance nozzle, the central inlet part is provided with a central large-diameter end and a central small-diameter end, the central linear part is integrally connected with the central small-diameter end, and the central large-diameter end faces the upstream direction of the fluid.
As the preferred technical scheme of balanced nozzle, edge entrance portion is provided with edge big footpath end and edge path end, and edge straight line portion and edge path end integrated into one piece are connected, and edge big footpath end is towards fluidic upstream direction, and the diameter of edge big footpath end is greater than the diameter of center big footpath end, and the diameter of edge path end is greater than the diameter of center path end.
As a preferable technical scheme of the balance nozzle, a is set as a distance between the center large diameter end and the center small diameter end, b is set as a distance between the edge large diameter end and the edge small diameter end, and a is smaller than b.
As a preferred solution of the balancing nozzle, the diameter of the central straight portion is smaller than the diameter of the edge straight portion.
As a preferred technical scheme of the balance nozzle, a plurality of edge nozzles are round and uniformly distributed on the substrate.
As a preferred solution of the balancing nozzle, the number of edge nozzles comprises 6.
The utility model provides a flowmeter, which comprises a front pipe body, a rear pipe body, flanges and balance nozzles in any scheme, wherein the front pipe body is fixedly connected with the rear pipe body, a base plate is arranged between the front pipe body and the rear pipe body, the base plate is welded with the front pipe body and the rear pipe body, the number of the flanges comprises two, and the two flanges are respectively fixedly connected with the front pipe body and the rear pipe body.
The beneficial effects of the utility model are as follows:
the utility model provides a balance nozzle which is used for a flowmeter and comprises a substrate, a central nozzle and a plurality of edge nozzles, wherein the cross section of the substrate comprises a circle, the central nozzle is fixedly arranged on the substrate, the central nozzle is coaxial with the substrate, the plurality of edge nozzles are fixedly arranged on the substrate, the axes of the plurality of edge nozzles are parallel to the axis of the central nozzle, and the diameter of the edge nozzle is larger than that of the central nozzle. Through the setting of center nozzle and a plurality of edge nozzle, reduce the pressure loss when fluid passes through, reduce simultaneously to the requirement of upstream and downstream straight tube section length, and the diameter of edge nozzle is greater than the diameter of center nozzle, because the fluid velocity of flow of edge department is little, the fluid velocity of flow of central point position is big, has reduced the disturbance degree of fluid behind center nozzle and a plurality of edge nozzle, promotes the measurement accuracy of sensor.
Drawings
FIG. 1 is a cross-sectional view of a flowmeter according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a balancing nozzle according to an embodiment of the present utility model;
FIG. 3 is a second schematic diagram of a balancing nozzle according to an embodiment of the present utility model;
FIG. 4 is a rear view of a balancing nozzle in an embodiment of the utility model;
FIG. 5 is a front view of a balancing nozzle in an embodiment of the utility model;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;
fig. 7 is a sectional view taken along the direction B-B in fig. 5.
In the figure:
1. a substrate;
2. a central nozzle; 21. a central inlet portion; 211. a center large diameter end; 212. a center small diameter end; 22. a center straight line portion;
3. an edge nozzle; 31. an edge inlet portion; 311. a large diameter end of the edge; 312. a small diameter end at the edge; 32. an edge line portion;
41. a front tube body; 42. a rear tube body;
5. and (3) a flange.
Detailed Description
The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the field of fluid flow measurement, differential pressure type flow meters are most widely applied, and the differential pressure type flow meters calculate the flow of fluid by utilizing the pressure difference between the front and rear of the flow meter, wherein the pressure loss of a nozzle flow meter is smaller, so that the energy is saved, the differential pressure type flow meter is firm and durable and suitable for high-temperature and high-pressure fluid, but the processing difficulty of the nozzle flow meter is higher, a straight pipe with a longer distance is required at the upstream and downstream of the flow meter, and the measuring precision is poorer and the measuring range is smaller at low flow rate.
The utility model provides a nozzle formula differential pressure flowmeter in the prior art, this flowmeter is through evenly setting up a plurality of nozzles in order to further reduce pressure loss, and can reduce the length requirement to upstream and downstream straight tube section, but because the inside wall of pipeline is to the influence of fluid, the velocity distribution of fluid in the pipeline is inhomogeneous, and the fluid velocity of flow that is close to pipeline center department is big in particular, and the fluid velocity of flow that is close to pipeline inside wall department is little, leads to a plurality of fluids to exist the disturbance great after a plurality of nozzle exports, leads to the lower problem of measurement accuracy.
In this regard, the present embodiment provides a balancing nozzle that also reduces pressure loss and reduces the length requirements for the upstream and downstream straight pipe sections, while also solving the above-described problems.
As shown in fig. 1 to 7, the present utility model provides a balance nozzle for a flow meter, the balance nozzle comprising a substrate 1, a center nozzle 2 and a plurality of edge nozzles 3, the cross-sectional shape of the substrate 1 comprising a circle, the center nozzle 2 being fixedly disposed on the substrate 1, the center nozzle 2 being coaxial with the substrate 1, the plurality of edge nozzles 3 being fixedly disposed on the substrate 1, the axes of the plurality of edge nozzles 3 being parallel to the axis of the center nozzle 2, the diameter of the edge nozzle 3 being larger than the diameter of the center nozzle 2. Through the setting of center nozzle 2 and a plurality of edge nozzle 3, reduce the pressure loss when fluid passes through, reduce simultaneously to the requirement of upstream straight tube section length, and the diameter of edge nozzle 3 is greater than the diameter of center nozzle 2, because the fluid velocity of flow of edge department is little, the fluid velocity of flow of central point position is big, has reduced the disturbance degree of fluid behind center nozzle 2 and a plurality of edge nozzle 3, promotes the measurement accuracy of sensor.
Further, as shown in fig. 2-7, the number of edge nozzles 3 may be 3, 4, 5, 6, 7, or 8. The number of edge nozzles 3 in this embodiment is preferably 6, and 6 edge nozzles 3 are uniformly distributed in a circular shape on the substrate 1. The number of edge nozzles 3 can also be increased or decreased on the basis of the present embodiment by a person skilled in the art depending on the actual conditions. The plurality of edge nozzles 3 which are uniformly distributed in a circular shape can ensure that disturbance among the plurality of edge nozzles 3 is minimized, thereby further improving the accuracy of the flowmeter.
Further, the center nozzle 2 includes a center inlet portion 21 and a center straight portion 22, and the center inlet portion 21 penetrates the base plate 1 and is integrally connected with the base plate 1. The center linear portion 22 is integrally connected to the center inlet portion 21, and the axis of the center linear portion 22 is coaxial with the substrate 1. The center inlet portion 21 is provided with a center large diameter end 211 and a center small diameter end 212. The center large diameter end 211 faces in the upstream direction of the fluid, and the center small diameter end 212 is integrally connected and communicates with the center straight portion 22, thereby forming a passage for the fluid to pass through. The fluid passes through the center large diameter end 211, the center small diameter end 212, and the center straight portion 22 in this order, and is discharged. In this embodiment, the longitudinal cross-section of the central inlet portion 21 may be rectilinear, circular or hyperbolic, preferably hyperbolic, to reduce pressure losses during fluid passage. The principle of the corresponding hyperbolic inlet to reduce fluid pressure loss is prior art in the art and is not repeated here.
Further, the edge nozzle 3 includes an edge inlet portion 31 and an edge straight portion 32, and the edge inlet portion 31 penetrates the substrate 1 and is integrally connected with the substrate 1. The edge straight portion 32 is integrally connected with the edge inlet portion 31, and the axis of the edge straight portion 32 is coaxial with the substrate 1. The edge inlet portion 31 is provided with an edge large diameter end 311 and an edge small diameter end 312. The edge large diameter end 311 faces in the upstream direction of the fluid, and the edge small diameter end 312 is integrally connected and communicates with the edge straight portion 32, thereby forming a passage for the fluid to pass through. The fluid passes through the edge large diameter end 311, the edge small diameter end 312, and the edge straight portion 32 in this order, and is discharged. The shape of the longitudinal cross section of the edge inlet portion 31 in this embodiment may be straight, circular or hyperbolic, preferably hyperbolic, to reduce pressure loss during fluid passage. The principle of the corresponding hyperbolic inlet to reduce fluid pressure loss is prior art in the art and is not repeated here.
In particular, as shown in fig. 5-7, to further avoid turbulence between the individual nozzles, the center nozzle 2 and the plurality of edge nozzles 3 are designed with equal reynolds numbers. Embodied as the diameter of the center large diameter end 211 is smaller than the diameter of the edge large diameter end 311, and the diameter of the center small diameter end 212 is smaller than the diameter of the edge small diameter end 312. The diameter of the central straight portion 22 is smaller than the diameter of the edge straight portion 32, in particular the diameter of the passage of the central straight portion 22 for the passage of fluid is smaller than the diameter of the passage of the edge straight portion 32 for the passage of fluid. In the present embodiment, the difference between the center large diameter end 211 and the edge large diameter end 311, the center small diameter end 212 and the edge small diameter end 312, and the center straight portion 22 and the edge straight portion 32 is determined according to the relative positions of the edge nozzle 3 and the center nozzle 2. Specifically, the larger the distance between the edge nozzle 3 and the center nozzle 2, the larger the difference in size between the edge nozzle 3 and the center nozzle 2. The design of the equal reynolds numbers ensures that the flow characteristics of the fluid after passing through the central nozzle 2 and the plurality of edge nozzles 3 are the same, thereby reducing signal disturbance between each other.
Further, in order to ensure that the pressure loss after flowing through the central nozzle 2 and the pressure loss after flowing through the edge nozzle 3 are as equal as possible, signal disturbance is further avoided. Let a be the distance between the center large diameter end 211 and the center small diameter end 212, and b be the distance between the edge large diameter end 311 and the edge small diameter end 312, a is smaller than b. Correspondingly, the longitudinal cross-sectional shapes of the central inlet portion 21 and the edge inlet portion 31 are preferably hyperbolic so that the longitudinal cross-section of the edge inlet portion 31 coincides with the longitudinal cross-section of the scaled-up central inlet portion 21.
As shown in fig. 1, the present utility model also provides a flow meter including a front pipe body 41, a rear pipe body 42, a flange 5, and a balance nozzle in this embodiment. The front tube 41 and the rear tube 42 are fixedly connected, preferably by welding. The base plate 1 of the balance nozzle is disposed between the front tube 41 and the rear tube 42 and both sides of the base plate 1 are welded to the front tube 41 and the rear tube 42, respectively. The number of the flanges 5 is two, and the two flanges 5 are welded with the front pipe body 41 and the rear pipe body 42, respectively. The balance nozzle is arranged, so that the flowmeter can be applied to a pipeline of a shorter straight pipe section, the application scene of the flowmeter is widened, and meanwhile, the measurement precision can be improved due to smaller disturbance of a flowmeter signal of the balance nozzle.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. Balance nozzle for a flow meter, comprising:
a substrate (1), the cross-sectional shape of the substrate (1) comprising a circular shape;
a central nozzle (2), wherein the central nozzle (2) is fixedly arranged on the substrate (1), and the central nozzle (2) is coaxial with the substrate (1);
the edge nozzles (3) are fixedly arranged on the substrate (1), the axes of the edge nozzles (3) are parallel to the axis of the central nozzle (2), and the diameter of the edge nozzle (3) is larger than that of the central nozzle (2).
2. Balancing nozzle according to claim 1, characterized in that the central nozzle (2) comprises:
a central inlet portion (21), the central inlet portion (21) being fixedly arranged on the substrate (1);
and a central straight line part (22), wherein the central straight line part (22) is integrally connected with the central inlet part (21), and the axis of the central straight line part (22) is coaxial with the base plate (1).
3. Balancing nozzle according to claim 2, characterized in that the edge nozzle (3) comprises:
an edge inlet portion (31), the edge inlet portion (31) being fixedly arranged on the substrate (1);
and an edge straight line part (32), wherein the edge straight line part (32) is integrally connected with the edge inlet part (31), and the axis of the edge straight line part (32) is parallel to the axis of the central straight line part (22).
4. A balancing nozzle according to claim 3, characterized in that the central inlet portion (21) is provided with a central large diameter end (211) and a central small diameter end (212), the central straight portion (22) being integrally connected with the central small diameter end (212), the central large diameter end (211) being directed in the upstream direction of the fluid.
5. The balancing nozzle according to claim 4, characterized in that the edge inlet portion (31) is provided with an edge large diameter end (311) and an edge small diameter end (312), the edge straight portion (32) is integrally connected with the edge small diameter end (312), the edge large diameter end (311) faces the upstream direction of the fluid, the diameter of the edge large diameter end (311) is larger than the diameter of the center large diameter end (211), and the diameter of the edge small diameter end (312) is larger than the diameter of the center small diameter end (212).
6. The balancing nozzle according to claim 5, wherein a is smaller than b, provided that a distance of the center large diameter end (211) from the center small diameter end (212) is a, and a distance of the edge large diameter end (311) from the edge small diameter end (312) is b.
7. Balancing nozzle according to claim 5, characterized in that the diameter of the central straight portion (22) is smaller than the diameter of the edge straight portion (32).
8. Balancing nozzle according to any one of claims 1 to 7, characterized in that a plurality of the edge nozzles (3) are circular and evenly distributed on the substrate (1).
9. Balancing nozzle according to claim 8, characterized in that the number of edge nozzles (3) comprises 6.
10. Flowmeter, including preceding body (41), back body (42) and flange (5), its characterized in that still includes the balanced nozzle of any one of claims 1-9, preceding body (41) with back body (42) fixed connection, base plate (1) set up preceding body (41) with between back body (42), base plate (1) with preceding body (41) with back body (42) welding, the quantity of flange (5) includes two, two flange (5) respectively with preceding body (41) with back body (42) fixed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320811119.1U CN219608117U (en) | 2023-04-13 | 2023-04-13 | Balanced nozzle and flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320811119.1U CN219608117U (en) | 2023-04-13 | 2023-04-13 | Balanced nozzle and flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219608117U true CN219608117U (en) | 2023-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320811119.1U Active CN219608117U (en) | 2023-04-13 | 2023-04-13 | Balanced nozzle and flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219608117U (en) |
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2023
- 2023-04-13 CN CN202320811119.1U patent/CN219608117U/en active Active
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